Search Publications
Detection of X-rays from the jet-driving symbiotic star Hen 3-1341
Sokoloski, J. L.; Luna, G. J. M.; Stute, M. +1 more
Context. Hen 3-1341 is a symbiotic binary system consisting of a white dwarf and a red giant star that is one of about ten symbiotics that show hints of jets. The bipolar jets have been detected through displaced components of emission lines during its outburst from 1998 to 2004. These components disappeared when Hen 3-1341 reached quiescence. On …
Enceladus auroral hiss observations: Implications for electron beam locations
Gurnett, D. A.; Hospodarsky, G. B.; Leisner, J. S.
<title type="main">Abstract<p label="1">The Cassini spacecraft has made 20 close flybys of the icy moon Enceladus between its arrival at Saturn in 2004 and 2012. Of those 20, strong whistler mode emissions (often called auroral hiss) were clearly observed on seven encounters. The propagation paths of these emissions are determined by t…
The solubility of 40Ar and 84Kr in liquid hydrocarbons: Implications for Titan's geological evolution
Sotin, Christophe; Choukroun, Mathieu; Hodyss, Robert +1 more
solubility of argon and krypton in methane and ethane has been experimentally determined at Titan-relevant temperatures. At typical Titan surface temperature (94 K), argon and krypton solubilities are very large (47% in methane and 15% in ethane for Ar, 29% in methane and 43% in ethane for Kr), making liquid alkanes on Titan an important potential…
Geomorphic signatures of glacial activity in the Alba Patera volcanic province: Implications for recent frost accumulation on Mars
Sinha, Rishitosh K.; Murty, Sripada V. S.
landforms lying within impact craters on Mars have led to the identification of two mechanisms for their formation: (1) intermittent deposition of atmospherically emplaced snow/ice during past spin-axis/orbital conditions and (2) flow of debris-covered ice-rich deposits. The maximum presence of the young ice/snow-rich features (thermal contraction…
Properties and morphologies of Lyman break galaxies at z ∼ 1 in the Chandra Deep Field South, inferred from spectral energy distributions
Buat, V.; Burgarella, D.; Huang, J. -S. +3 more
After carefully cross-identifying previously discovered - and selected by the Galaxy Evolution Explorer (GALEX) - Lyman break galaxy (LBG) candidates one-to-one with their optical counterparts in the field of the Chandra Deep Field South (CDF-S), we re-estimate their photometric redshifts using multiwavelength data from ultraviolet and optical to …
Heliospheric Energetic Neutral Hydrogen Measured with ASPERA-3 and ASPERA-4
Barabash, S.; Grigoriev, A.; Wurz, P. +6 more
We re-analyze the signal of non-planetary energetic neutral atoms (ENAs) in the 0.4-5.0 keV range measured with the Neutral Particle Detector (NPD) of the ASPERA-3 and ASPERA-4 experiments on board the Mars and Venus Express satellites. Due to improved knowledge of sensor characteristics and exclusion of data sets affected by instrument effects, t…
A Comparative Study of Clustering Methods for Active Region Detection in Solar EUV Images
Caballero, C.; Aranda, M. C.
The increase in the amount of solar data provided by new satellites makes it necessary to develop methods to automate the detection of solar features. Here we present a method for automatically detecting active regions in solar extreme ultraviolet (EUV) images using a series of steps. Initially, the bright regions in the image are segmented using …
The opacity of spiral galaxy disks: IX. Dust and gas surface densities
Leroy, A.; Holwerda, B. W.; Allen, R. J. +4 more
Our aim is to explore the relation between gas, atomic and molecular, and dust in spiral galaxies. Gas surface densities are from atomic hydrogen and CO line emission maps. To estimate the dust content, we use the disk opacity as inferred from the number of distant galaxies identified in twelve HST/WFPC2 fields of ten nearby spiral galaxies. The o…
Cluster observation of few-hour-scale evolution of structured plasma in the inner magnetosphere
Lundin, R.; Yamauchi, M.; Dandouras, I. +2 more
Using Cluster Ion Spectrometry (CIS) data from the spacecraft-4 perigee traversals during the 2001-2006 period (nearly 500 traversals after removing those that are highly contaminated by radiation belt particles), we statistically examined the local time distribution of structured trapped ions at sub- to few-keV range as well as inbound-outbound d…
VLA/JVLA monitoring of bright northern radio sources
López-Caniego, M.; Partridge, B.; Myers, S. +3 more
We report multiple epoch VLA/JVLA observations of 89 northern hemisphere sources, most with 37 GHz flux density >1 Jy, observed at 4.8, 8.5, 33.5, and 43.3 GHz. The high frequency selection leads to a predominantly flat spectrum sample, with 85% of our sources being in the Planck Early Release Compact Source Catalog (ERCSC). These observations …